Ive noticed it too, that Trife probably writes or at least helps him write a lot of his new material. Now with BDR, its pretty clear which songs have his trademark and which dont. For instance, I'd bet my left testical that Trife had some part or was completely responsible for ghostwriting the song Walk Around. When I listen to that song, which i love by the way, i almost dont even here ghosts voice, i just hear Trifes.
I wouldnt put much thought into trife ghostwriting his verses tho. To me saying that would be like saying Cappadonna was a ghostwriter on his old stuff.....which may or not be that far off
My technique alone blows doors straight off their hinges.